"That guy did not just get off the fuckin' couch. If he did, I'm gonna get a couch like that."
There are some genres where pretty much every single movie it churns out is pretty much the same as the last one you watched. The "sports-film" genre isn't really any different. But here, in this genre, we have subcategories. There are not just sports-films, but Boxing-sports-films. They all pretty much include the same story. Some schmuck who wasn't very smart in school, is a poor bum who happens to have a "talent": he could knock people out. Through this God-given ability to smash heads like pumpkins, he falls in love, makes some money, and resolves most of the strained relationships in his life. The good ones though, don't really break the formula as much as they try and do what they can to poke some holes into it.